硒作为动物和人体营养必需的一种微量元素已受到普遍重视。越来越多的国家和地区用不同方式补充硒,大面积防治家畜和家禽的硒缺乏病取得成功。补充硒已成为畜牧、兽医工作中一个不可缺少的手段。关于硒与人体健康和疾病的关系的报告也日益增多,已开始将硒试用于某些疾病的防治。然而,长期以来硒具有致癌作用的说法,又给在动物和人体的疾病防治中使用硒造成很大顾虑。不少国家因此迟迟未在卫生法规中准许在家畜或家禽饲料 Selenium, a trace element essential for animal and human nutrition, has received universal attention. More and more countries and regions use different ways to supplement selenium, and large-scale success in controlling selenium deficiency in livestock and poultry. Selenium supplementation has become an indispensable tool in animal husbandry and veterinary work. There has also been an increasing number of reports on the relationship between selenium and human health and disease, and selenium has begun to be used in the prevention and treatment of certain diseases. However, the notion that selenium has a long-term carcinogenic effect has given rise to serious concern for the use of selenium in the prevention and treatment of diseases in animals and humans. As a result, many countries have yet to allow animal or poultry feed in sanitation regulations